New Determination of the Astrophysical S Factor SE1 of the C12(α,γ)O16 Reaction
Abstract
A new measurement of the β-delayed α decay of N16 has been performed using a set of high efficiency ionization chambers. Sources were made by implantation of a N16 beam, yielding very clean α spectra down to energies as low as 400 keV. Our data are in good agreement with earlier results. For the S factor SE1, we obtain a value of 74±21keVb. In spite of improvements in the measurement, the error in SE1 remains relatively large because of the correlations among the fit parameters and the uncertainties inherent to the extrapolation.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 2007
- DOI:
- Bibcode:
- 2007PhRvL..99e2502T
- Keywords:
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- 21.10.Pc;
- 23.60.+e;
- 25.55.-e;
- 26.20.+f;
- Single-particle levels and strength functions;
- Alpha decay;
- <sup>3</sup>H- <sup>3</sup>He- and <sup>4</sup>He-induced reactions;
- Hydrostatic stellar nucleosynthesis